So I just recently changed my radiator and thermostat for new ones hoping that would resolve the problem over the heating as well as bleeding it out. I drove it about 2 blocks to see if that was it and just as I expected it over heated once again! The fans turn on as soon as it starts to overheat. I set up everything correctly so I don't know what else to do! My neighbor was telling me that the thermostat might not be opening up because one of the house is cold and should flowing through when the car is hot but it's not. So idk any help?

 

Are you sure you bled the system properly of air?

 

Is your water-pump working?

 

So i just fixed my radiator and thermostat, as well as bleeding it out from any air bubbles because it was over heating. the only problem that it started making now is that the engine cooling fans stay on and don't turn off. it is just annoying! anyone have this similar problem or know how to resolve it? i have to mention that it just started doing this in the past 2 days

by the way i have a 2003 g35 coupe

 

so i just got my car bleeded out with a certified mechanic because it was over heating and on top of that changed the radiator and thermostat. Car was working great last night wasn't over eating at all. this morning i was driving it and the temperature started to rise which sucks because i thought the problem was fixed.. also do you guys know why my cooling air fans won't turn off until i shut the car down? their loud and has never happened to me before..

 

Maybe the engine temperature sensor is going bad? Thinking the car is running hotter then normal or something? You could go to AutoZone and rent a block engine tester for like 25 bucks. If the fluid changes colors usually means your head gasket is shot; I would try that at least to eliminate that as your problem.